Real-time protection fails on Windows 2000 after you apply the Forefront Client Security October 2010 update

Hotfix Information

A supported hotfix is available from Microsoft. This fix applies only to Forefront Client Security agents running on Windows 2000.

Note This hotfix is available from Microsoft Update and from Windows Server Update Services. If you want to obtain the file for deployment by using a different method, follow these steps:

1. Visit the following Microsoft Update Catalog Web site: http://catalog.update.microsoft.com/v7/site/Home.aspx
2. Type 2459065 in the Search box, and then click Search.
3. Click Add to add the hotfix to the basket.
4. Click Download.
5. Click Browse, specify the folder to which you want to download the hotfix, and then click OK.
6. Click Continue, and then click I Accept to accept the Microsoft Software License Terms.
7. When the update is downloaded to the location that you specified, click Close

Prerequisites

There are no prerequisites for installing this hotfix.

Restart requirement

You may be required restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix replaces the anti-malware client that is deployed by using the Forefront Client Security deployment package (1.0.1725.0) on a computer.

976669 Forefront Client Security deployment package (1.0.1725.0): December 2009

This hotfix replaces the following hotfixes:

979536 Forefront Client Security anti-malware client update: April 2010

976668 Forefront Client Security anti-malware client update: December 2009

971026 A hotfix is available to resolve some problems with the Forefront Client Security anti-malware client

952265 Data corruption may occur on a computer that has Forefront Client Security installed

938054 A hotfix is available to resolve some problems with the Forefront Client Security client

956280 The Forefront Client Security kernel-mode mini-filter unloads when you browse a network file share that contains many malicious files

File information

The English version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Forefront Client Security, x86-based versions

Workaround

If either of the updates in the Symptom section are manually installed you must uninstall the Forefront Client Security October 2010 antimalware update on computers running Windows 2000 and install this update (KB2459065). You can uninstall the October 2010 update using one of the following methods:

• From a command line or script, run: msiexec.exe /x {A22989EE-AE7A-42F8-A0C0-9C99CFB644FB} /qn
• From the Add/Remove Programs applet, uninstall "Microsoft Forefront Client Security antimalware service"

In a properly functioning WSUS environment, after you uninstall the October 2010 update this version of the antimalware client will redeploy during the next Automatic Updates detection and installation cycle by applying the slipstream package described in the "More Information" section below. Alternatively, you may use the steps in the "Hotfix Information" section of this following article to manually download and install the Forefront Client Security antimalware agent on the affected computers after uninstalling the October 2010 update.